Using Cosponsorship to Estimate Ideal Points

Ideal point estimates based on roll‐call vote results have provided leverage for a variety of theory testing efforts. Recently, scholars have suggested using cosponsorship data as a proxy for roll‐call votes. Conceptually similar to roll‐call votes, cosponsorship data are appealing for a variety of reasons. However, the data‐generating process for cosponsorship is untheorized and little studied. We examine the properties of ideal point estimates from cosponsorship data. We find that the ability to estimate ideal points from cosponsorship data is contingent on the underlying data‐generating process; reliance on such measures requires strong and often unrealistic assumptions.     

New Formulas to Estimate Age at Death in Maya Populations Using Histomorphological Changes in the Fourth Human Rib*

Abstract: This study develops new histomorphological algorithms for Maya populations’ human ribs and tests the applicability of published algorithms. Thin sections from the fourth rib of 36 individuals of known age were analyzed under polarized light microscopy. Osteon population density (OPD, the concentration of intact and fragmented osteons per mm²), cortical area (CA), and osteon size (OS) were recorded. Seven algorithms were calculated, using all combinations of variables, and compared to the performance of published formulas. The OPD‐based formulas deviate from the known age 8.7 years on average, while those from OS and CA deviate between 10.7 and 12.8 years. In comparison, our OPD‐based algorithms perform better than the one by Stout and Paine and much better than Cho et al. In conclusion, algorithms should be developed using OPD for different ethnic groups; although Stout and Paine’s can be used for Maya and maybe Mesoamerican individuals.     

Police Legitimacy and the Norm to Cooperate: Using a Mixed Effects Location-Scale Model to Estimate the Strength of Social Norms at a Small Spatial Scale

Journal of Quantitative Criminology - Test whether cooperation with the police can be modelled as a place-based norm that varies in strength from one neighborhood to the next. Estimate whether...